20566828 has 12 divisors (see below), whose sum is σ = 36073912. Its totient is φ = 10260000.

The previous prime is 20566817. The next prime is 20566831. The reversal of 20566828 is 82866502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3798 + ... + 7453.

Almost surely, 2^20566828 is an apocalyptic number.

It is an amenable number.

20566828 is a deficient number, since it is larger than the sum of its proper divisors (15507084).

20566828 is a wasteful number, since it uses less digits than its factorization.

20566828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11712 (or 11710 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 20566828 is about 4535.0664824234. The cubic root of 20566828 is about 273.9822568296.

The spelling of 20566828 in words is "twenty million, five hundred sixty-six thousand, eight hundred twenty-eight".